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8361602: [TESTBUG] serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java deadlocks on exception #26279

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8361602: [TESTBUG] serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java deadlocks on exception #26279

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14 changes: 9 additions & 5 deletions test/hotspot/jtreg/serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2024, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
Expand Down Expand Up @@ -47,6 +47,8 @@

public class UnmountedVThreadNativeMethodAtTop {

boolean done;

/**
* Test dumping the heap while a virtual thread is blocked entering a synchronized native method.
*/
Expand Down Expand Up @@ -96,7 +98,9 @@ void VThreadBlockedAtOjectWait() throws Exception {
started.countDown();
try {
synchronized (lock) {
lock.wait();
while (!done) {
lock.wait();
}
}
} catch (InterruptedException e) { }
});
Expand All @@ -109,11 +113,11 @@ void VThreadBlockedAtOjectWait() throws Exception {

Path dumpFile = dumpHeap();
verifyHeapDump(dumpFile);

} finally {
synchronized (lock) {
done = true;
lock.notify();
}
} finally {
vthread.join();
}
}
Expand Down Expand Up @@ -159,4 +163,4 @@ private void await(Thread thread, Thread.State expectedState) throws Interrupted
static {
System.loadLibrary("UnmountedVThreadNativeMethodAtTop");
}
}
}